The world's premier destination for fine jewelry auctions since 2013
Imperium Exchange is the world's premier destination for fine jewelry auctions. Since our establishment in 2013, we have been connecting discerning collectors with exceptional pieces of jewelry, and gemstones.
Our expert team brings decades of combined experience in gemology, horology, and luxury goods authentication. We pride ourselves on our rigorous vetting process, ensuring every piece we offer meets the highest standards of quality and authenticity.
Every piece is rigorously authenticated by our expert gemologists and horologists, ensuring complete confidence in your purchase.
We curate only the finest jewelry and timepieces, maintaining the highest standards of quality and craftsmanship.
Built on transparency and integrity, we've earned the trust of collectors worldwide through decades of reliable service.
With decades of combined experience, our team of specialists brings unparalleled knowledge to every auction.
Our certified gemologists examine every stone, providing detailed reports on quality, origin, and treatment status.
We research and document the history of significant pieces, adding valuable context and authenticity.
Our experts track global market trends to provide accurate valuations and strategic selling advice.
From initial consultation to final sale, we provide personalized attention and professional guidance.
High-Stakes Diamond Auctions: $10M - $70M+
When you consign a high-value diamond to our auction house, you are legally prohibited from attending or viewing the live bidding session—either in person or via livestream. This isn't a suggestion; it's a contractual requirement backed by legal, ethical, and insurance mandates. Here's why:
Even if you have zero intention of bidding, your mere presence creates the appearance of impropriety. Auction laws and industry ethics require absolute transparency. If you're in the room (or logged into the livestream), any irregularities in bidding—legitimate or not—could trigger:
You don't need to bid to be implicated. Your presence alone is evidence in a legal challenge.
Our consignment agreements include strict confidentiality clauses that prohibit you from:
Violating these terms can result in immediate termination of the sale, legal action for breach of contract, and forfeiture of your consignment fee.
High-value auctions carry $50M-$100M+ liability policies. Insurers require:
If you breach this firewall, the insurer can void coverage—leaving YOU personally liable for any disputes, including a $30M+ claim if a buyer alleges fraud.
Ultra-high-net-worth buyers (sovereigns, oligarchs, celebrities) demand absolute anonymity. They will NOT bid if:
A single "known consignor" in the audience has historically killed 40-60% of potential bids, costing sellers millions in lost hammer prices.
Consignors who watch auctions often:
Auction houses have a fiduciary duty to ALL buyers—not just you. Your emotional investment cannot compromise the integrity of the sale.
Depending on jurisdiction, high-value auctions must comply with:
Regulators have shut down entire auction houses for allowing consignor access to live sessions.
In 2022, a consignor attempted to use a proxy to livestream a $30M+ diamond auction. The buyer (a Middle Eastern royal family) discovered the breach mid-auction and withdrew all bids. The lot was pulled, the consignor was sued for $8M in damages (lost buyer premiums + legal fees), and the auction house's insurance dropped them. The diamond eventually sold at a competitor for $32M—but the original consignor received nothing due to contract violations.
The cost of "just watching"? $32 million in lost proceeds + $8M in legal judgments.
This isn't about distrust—it's about protecting your sale. The moment you consign a high-value piece, you transfer custody to experts who operate under legal, financial, and ethical frameworks designed to maximize your outcome. Interfering with that process doesn't just risk your sale—it jeopardizes the entire auction's legitimacy, exposing you to catastrophic legal and financial consequences.
Whether buying or selling, our team is ready to assist you